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Finding the Fourth Proportional to 192,079.92, 288,206.28 and 121,940.40

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Solution

The fourth proportional to 192,079.92, 288,206.28 and 121,940.40 is: 182,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,079.92 : 288,206.28 = 121,940.40 : x
  2. Step 2: Convert to fraction form
    192,079.92/288,206.28 = 121,940.40/x
  3. Step 3: Cross multiply
    192,079.92x = 288,206.28 × 121,940.40
  4. Step 4: Simplify right side
    192,079.92x = 35,143,989,065.71
  5. Step 5: Solve for x
    x = 35,143,989,065.71/192,079.92
  6. Step 6: Final answer
    x = 182,965.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.